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Liquid chromatography with alkylammonium formate ionic liquid mobile phases and fluorescence detection. J Chromatogr A 2018; 1559:128-135. [DOI: 10.1016/j.chroma.2018.03.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 03/05/2018] [Accepted: 03/12/2018] [Indexed: 02/05/2023]
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2
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Margetić A, Vujčić Z. Comparative study of stability of soluble and cell wall invertase from Saccharomyces cerevisiae. Prep Biochem Biotechnol 2016; 47:305-311. [DOI: 10.1080/10826068.2016.1244683] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Aleksandra Margetić
- Department of Chemistry, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Belgrade, Serbia
| | - Zoran Vujčić
- Department of Biochemistry, Faculty of Chemistry, University of Belgrade, Belgrade, Serbia
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Zhou L, Danielson ND. The ionic liquid isopropylammonium formate as a mobile phase modifier to improve protein stability during reversed phase liquid chromatography. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 940:112-20. [PMID: 24141045 PMCID: PMC4209125 DOI: 10.1016/j.jchromb.2013.08.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 07/31/2013] [Accepted: 08/01/2013] [Indexed: 10/26/2022]
Abstract
The room temperature ionic liquid isopropylammonium formate (IPAF) is studied as a reversed phase HPLC mobile phase modifier for separation of native proteins using a polymeric column and the protein stability is compared to that using acetonitrile (MeCN) as the standard organic mobile phase modifier. A variety of important proteins with different numbers of subunits are investigated, including non-subunit proteins: albumin, and amyloglucosidase (AMY); a two subunit protein: thyroglobulin (THY); and four subunit proteins: glutamate dehydrogenase (GDH) and lactate dehydrogenase (LDH). A significant enhancement in protein stability is observed in the chromatograms upon using IPAF as a mobile phase modifier. The first sharper peak at about 2min represented protein in primarily the native form and a second broader peak more retained at about 5-6min represented substantially denatured or possibly aggregated protein. The investigated proteins (except LDH) could maintain the native form within up to 50% IPAF, while a mobile phase, with as low as 10% MeCN, induced protein denaturation. The assay for pyruvate using LDH has further shown that enzymatic activity can be maintained up to 30% IPAF in water in contrast to no activity using 30% MeCN.
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Affiliation(s)
- Ling Zhou
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH 45056, United States.
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Wan YY, Lu R, Xiao L, Du YM, Miyakoshi T, Chen CL, Knill CJ, Kennedy JF. Effects of organic solvents on the activity of free and immobilised laccase from Rhus vernicifera. Int J Biol Macromol 2010; 47:488-95. [DOI: 10.1016/j.ijbiomac.2010.07.003] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2010] [Accepted: 07/12/2010] [Indexed: 11/16/2022]
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5
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Huneke FU, Nucci R, Cowan D. Effect of Water Miscible Organic Solvents on Kinetics of a Thermostable β-Glycosidase. BIOCATAL BIOTRANSFOR 2009. [DOI: 10.3109/10242429909015229] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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6
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Cellesi F, Tirelli N. Sol–gel synthesis at neutral pH in W/O microemulsion: A method for enzyme nanoencapsulation in silica gel nanoparticles. Colloids Surf A Physicochem Eng Asp 2006. [DOI: 10.1016/j.colsurfa.2006.05.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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7
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Kudryashova EV, Artemova TM, Vinogradov AA, Gladilin AK, Mozhaev VV, Levashov AV. Stabilization and activation of alpha-chymotrypsin in water-organic solvent systems by complex formation with oligoamines. Protein Eng Des Sel 2003; 16:303-9. [PMID: 12736374 DOI: 10.1093/proeng/gzg039] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Formation of enzyme-oligoamine complexes was suggested as an approach to obtain biocatalysts with enhanced resistance towards inactivation in water-organic media. Complex formation results in broadening (by 20-40% v/v ethanol) of the range of cosolvent concentrations where the enzyme retains its catalytic activity (stabilization effect). At moderate cosolvent concentrations (20-40% v/v) complex formation activates the enzyme (by 3-6 times). The magnitude of activation and stabilization effects increases with the number of possible electrostatic contacts between the protein surface and the molecules of oligoamines (OA). Circular dichroism spectra in the far-UV region show that complex formation stabilizes protein conformation and prevents aggregation in water-organic solvent mixtures. Two populations of the complexes with different thermodynamic stabilities were found in alpha-chymotrypsin (CT)-OA systems depending on the CT/OA ratio. The average dissociation constants and stoichiometries of both low- and high-affinity populations of the complexes were estimated. It appears that it is the low-affinity sites on the CT surface that are responsible for the activation effect.
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Affiliation(s)
- Elena V Kudryashova
- Chemistry Department, M.V. Lomonosov Moscow State University, 119899 Moscow, Russia.
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8
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Reversible immobilization of urease onto Procion Brown MX-5BR-Ni(II) attached polyamide hollow-fibre membranes. Process Biochem 2002. [DOI: 10.1016/s0032-9592(02)00198-x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Köditz J, Arnold U, Ulbrich-Hofmann R. Dissecting the effect of trifluoroethanol on ribonuclease A. Subtle structural changes detected by nonspecific proteases. EUROPEAN JOURNAL OF BIOCHEMISTRY 2002; 269:3831-7. [PMID: 12153580 DOI: 10.1046/j.1432-1033.2002.03079.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
With the aim to distinguish between local and global conformational changes induced by trifluoroethanol in RNase A, spectroscopic and activity measurements in combination with proteolysis by unspecific proteases have been exploited for probing structural transitions of RNase A as a function of trifluoroethanol concentration. At > 30% (v/v) trifluoroethanol (pH 8.0; 25 degrees C), circular dichroism and fluorescence spectroscopy indicate a cooperative collapse of the tertiary structure of RNase A coinciding with the loss of its enzymatic activity. In contrast to the denaturation by guanidine hydrochloride, urea or temperature, the breakdown of the tertiary structure in trifluoroethanol is accompanied by an induction of secondary structure as detected by far-UV circular dichroism spectroscopy. Proteolysis with the nonspecific proteases subtilisin Carlsberg or proteinase K, both of which attack native RNase A at the Ala20-Ser21 peptide bond, yields refined information on conformational changes, particularly in the pretransition region. While trifluoroethanol at concentrations > 40% results in a strong increase of the rate of proteolysis and new primary cleavage sites (Tyr76-Ser77, Met79-Ser80) were identified, the rate of proteolysis at trifluoroethanol concentrations < 40% (v/v) is much smaller (up to two orders of magnitude) than that of the native RNase A. The proteolysis data point to a decreased flexibility in the surrounding of the Ala20-Ser21 peptide bond, which we attribute to subtle conformational changes of the ribonuclease A molecule. These changes, however, are too marginal to alter the overall catalytic and spectroscopic properties of ribonuclease A.
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Affiliation(s)
- Jens Köditz
- Department of Biochemistry/Biotechnology, Martin-Luther University Halle-Wittenberg, Halle, Germany
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Arica MY. Epoxy-derived pHEMA membrane for use bioactive macromolecules immobilization: Covalently bound urease in a continuous model system. J Appl Polym Sci 2000. [DOI: 10.1002/1097-4628(20000829)77:9<2000::aid-app16>3.0.co;2-m] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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11
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Sellek GA, Chaudhuri JB. Biocatalysis in organic media using enzymes from extremophiles. Enzyme Microb Technol 1999. [DOI: 10.1016/s0141-0229(99)00075-7] [Citation(s) in RCA: 172] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Santamaría RI, Del Río G, Saab G, Rodríguez ME, Soberón X, López-Manguía A. Alcoholysis reactions from starch with alpha-amylases. FEBS Lett 1999; 452:346-50. [PMID: 10386619 DOI: 10.1016/s0014-5793(99)00667-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
The ability of alpha-amylases from different sources to carry out reactions of alcoholysis was studied using methanol as substrate. It was found that while the enzymes from Aspergillus niger and Aspergillus oryzae, two well-studied saccharifying amylases, are capable of alcoholysis reactions, the classical bacterial liquefying alpha-amylases from Bacillus licheniformis and Bacillus stearothermophilus are not. The effect of starch and methanol concentration, temperature and pH on the synthesis of glucosides with alpha-amylase from A. niger was studied. Although methanol may inactivate alpha-amylase, a 90% substrate relative conversion can be obtained in 20% methanol at a high starch concentration (15% w/v) due to a stabilizing effect of starch on the enzyme. As the products of alcoholysis are a series of methyl-oligosaccharides, from methyl-glucoside to methyl-hexomaltoside, alcoholysis was indirectly quantified by high performance liquid chromatography analysis of the total methyl-glucoside produced after the addition of glucoamylase to the alpha-amylase reaction products. More alcoholysis was obtained from intact soluble starch than with maltodextrins or pre-hydrolyzed starch. The biotechnological implications of using starch as substrate for the production of alkyl-glucosides is analyzed in the context of these results.
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Affiliation(s)
- R I Santamaría
- Instituto de Biotecnología, UNAM, Cuernavaca, Morelos, Mexico
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Arica M, Alaeddinoğlu N, Hasirci V. Immobilization of glucoamylase onto activated pHEMA/EGDMA microspheres: properties and application to a packed-bed reactor. Enzyme Microb Technol 1998. [DOI: 10.1016/s0141-0229(97)00139-7] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Activity and stability of native and modified alanine aminotransferase in cosolvent systems and denaturants. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s1381-1177(96)00018-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Rodríguez M, Gómez A, Gónzalez F, Barzana E, López-Munguía A. Stability of invertase in alcoholysis reactions with methanol. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s1381-1177(96)00063-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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17
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Abstract
The stability of invertase was studied under various conditions, including at 75 degrees C, in presence of stabilizers (sorbitol and glycerol) at 75 degrees C, and in the presence of denaturants (urea and trichloroacetic acid) at 37 degrees C in reverse micelles. Stability of the invertase in reverse micelles was found to be improved over that of the enzyme in bulk aqueous solution. Sorbitol could enhance enzyme stability as it does in the bulk aqueous system. The stabilizing effect of glycerol was reduced in reverse micelles. The denaturation pattern of urea remains unaltered. However, the denaturation effect of trichloroacetic acid has been reduced in reverse micelles.
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Affiliation(s)
- S Subramani
- Post-Graduate Department of Biosciences, Sardar Patel University, Gujarat, India
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Rodríguez M, Gómez A, González F, Barzana E, López-Munguía A. Selectivity of methyl-fructoside synthesis with beta-fructofuranosidase. Appl Biochem Biotechnol 1996; 59:167-75. [PMID: 8678485 DOI: 10.1007/bf02787818] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Enzyme synthesis of methyl fructoside was studied using beta-fructofuranosidase from Sacharomyces cerevisiae and sucrose and methanol as substrates. Taking into account the inhibition and deactivation effects of methanol on the enzyme, a system with 4.9M (20%, v/v) methanol was selected. At this alcohol level, 35% of sucrose is converted to fructoside at low or high substrate concentrations. The effect of enzyme concentration, pH, and temperature on both the synthesis and the hydrolysis of the fructoside was investigated. It was found that if the reaction proceeds at pH 6.0, 4 degree C and/or 0.014 mg/mL (3 U/mL) of beta-fructofuranosidase at varying sucrose concentrations, methyl fructoside may be obtained with a minimum loss of the fructoside at the end of the reaction.
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Affiliation(s)
- M Rodríguez
- Instituto de Biotecnologia, UNAM, Cuernavaca, Morelos 62271, México
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Feature of an amperometric ferrocyanide-mediating H2O2 sensor for organic-phase assay based on regenerated silk fibroin as immobilization matrix for peroxidase. Electrochim Acta 1996. [DOI: 10.1016/0013-4686(95)00280-r] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Lima FV, Pyle DL, Asenjo JA. Factors affecting the esterification of lauric acid using an immobilized biocatalyst: Enzyme characterization and studies in a well-mixed reactor. Biotechnol Bioeng 1995; 46:69-79. [DOI: 10.1002/bit.260460110] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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KANG YOUNG, MARANGONI ALEJANDROG, YADA RICKEYY. EFFECT OF TWO POLAR ORGANIC-AQUEOUS SOLVENT SYSTEMS ON THE STRUCTURE-FUNCTION RELATIONSHIPS OF PROTEASES II. CHYMOSIN AND MUCOR MIEHEI PROTEINASE. J Food Biochem 1993. [DOI: 10.1111/j.1745-4514.1993.tb00481.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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KANG YOUNG, MARANGONI ALEJANDROG, YADA RICKEYY. EFFECT OF TWO POLAR ORGANIC-AQUEOUS SOLVENT SYSTEMS ON THE STRUCTURE-FUNCTION RELATIONSHIPS OF PROTEASES III. PAPAIN AND TRYPSIN. J Food Biochem 1993. [DOI: 10.1111/j.1745-4514.1993.tb00482.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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KANG YOUNG, MARANGONI ALEJANDROG, YADA RICKEYY. EFFECT OF TWO POLAR ORGANIC-AQUEOUS SOLVENT SYSTEMS ON THE STRUCTURE-FUNCTION RELATIONSHIP OF PROTEASES I. PEPSIN. J Food Biochem 1993. [DOI: 10.1111/j.1745-4514.1993.tb00480.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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